/// <summary>
/// /// Starts up Vimba API and loads all transport layers
/// </summary>
/// <param name="cameraListChangedHandler">The event handler to handle the camea list changed event</param>
public void Startup(CameraListChangedHandler cameraListChangedHandler)
{
//Instanciate main Vimba object
Vimba vimba = new Vimba();
//Start up Vimba API
vimba.Startup();
m_Vimba = vimba;
bool bError = true;
try
{
//Register camera list change delegate
if (null != cameraListChangedHandler)
{
m_Vimba.OnCameraListChanged += this.OnCameraListChange;
m_CameraListChangedHandler = cameraListChangedHandler;
}
bError = false;
}
finally
{
//Release Vimba API if an error occured
if (true == bError)
{
ReleaseVimba();
}
}
}
/// <summary>
/// Releases the camera
/// Shuts down Vimba
/// </summary>
private void ReleaseVimba()
{
if (m_Vimba != null)
{
//We can use cascaded try-finally blocks to release the
//Vimba API step by step to make sure that every step is executed.
try
{
try
{
if (null != m_CameraListChangedHandler)
{
m_Vimba.OnCameraListChanged -= this.OnCameraListChange;
}
}
finally
{
//Now finally shutdown the API
m_CameraListChangedHandler = null;
m_Vimba.Shutdown();
}
}
finally
{
m_Vimba = null;
}
}
}
/// <summary>
/// The event handler for the camera list changed event
/// </summary>
/// <param name="reason">The reason why this event was fired</param>
private void OnCameraListChange(VmbUpdateTriggerType reason)
{
switch (reason)
{
case VmbUpdateTriggerType.VmbUpdateTriggerPluggedIn:
case VmbUpdateTriggerType.VmbUpdateTriggerPluggedOut:
{
CameraListChangedHandler cameraListChangedHandler = m_CameraListChangedHandler;
if (null != cameraListChangedHandler)
{
cameraListChangedHandler(this, EventArgs.Empty);
}
}
break;
default:
break;
}
}
/// <summary>
/// Releases the camera
/// Shuts down Vimba
/// </summary>
private void ReleaseVimba()
{
if (null != this.m_Vimba)
{
// We can use cascaded try-finally blocks to release the
// Vimba API step by step to make sure that every step is executed.
try
{
try
{
try
{
// First we release the camera (if there is one)
this.ReleaseCamera();
}
finally
{
if (null != this.m_CameraListChangedHandler)
{
this.m_Vimba.OnCameraListChanged -= this.OnCameraListChange;
}
}
}
finally
{
// Now finally shutdown the API
this.m_CameraListChangedHandler = null;
this.m_Vimba.Shutdown();
}
}
finally
{
this.m_Vimba = null;
}
}
}
